[First Batch Sold Out! Thank You!] New Sauna-Exclusive Device "SAWATCH-3" Now Accepting Reservations for Next Shipment (Scheduled Mid-June)!
100plus Inc. has started accepting reservations for the next shipment of its new sauna-exclusive wearable device, "SAWATCH-3." This device measures the autonomic nervous system status and heart rate changes during sauna in real-time, supporting safe and effective sauna use tailored to individual physical conditions. The first batch has sold out, with the next shipment expected in mid-June.
📋 Article Processing Timeline
- 📰 Published: May 1, 2026 at 22:58
- 🔍 Collected: May 1, 2026 at 14:31
- 🤖 AI Analyzed: May 1, 2026 at 15:09 (37 min after Collected)
Overview
100plus Inc. (Headquarters: Tokyo, Representative Director CEO: Hirotaka Kato) has started sales (reservation acceptance) for "SAWATCH-3," the third generation of its sauna-exclusive wearable device.
While sauna is becoming a well-established health habit, if the burden on the body becomes excessive, the very health benefits can have "adverse effects." It is necessary to understand "how to enter properly" according to one's constitution and physical condition on that day, but relying solely on sensation is difficult.
Therefore, we have developed SAWATCH as a device to safely and deeply enjoy sauna based on objective data.
After the second-generation device (SHOWDOWN-1) significantly updated measurement performance during sauna, SAWATCH-3 redesigned from scratch, further refining durability, stability, and sauna measurement functions. Furthermore, this latest model allows users to reflect on how sauna affects their "daily life" (activity level, stress level, sleep), evolving into a "partner" that maximizes the effects of sauna.
Sauna measurement further evolved! Real-time understanding of autonomic nervous system status!
SAWATCH-3's New Functions: 'Strain' and 'Slope'
'Strain' is a function that displays the real-time status of the autonomic nervous system during sauna, cold bath, and rest. By looking at Strain, users can check if there is an excessive load in the sauna room or cold bath, and if they are relaxing during rest.
'Slope' is a function that displays the heart rate trend in real-time. Before an excessive load occurs, it can be used to understand how much load is being applied and at what intensity, thereby "preventing" excessive load.
Recommended Usage
▶︎Sauna Room
In the first half, check 'Slope' to adjust the heart rate trend. The trend differs for the 1st, 2nd, and 3rd sets, so adjust after entering the sauna room; if the number is high, move to a lower tier, and if low, move to a higher tier. In the second half, switch to 'Strain'. It is displayed in 7 levels, so when Strain reaches 5 or 6, it's about time to leave. If it goes up to 7, it's an excessive state. Adjust the load well with breathing.
▶︎Cold Bath
Focus on 'Slope'. When entering a cold bath, the heart rate significantly drops to negative, then gradually stabilizes, and Slope approaches 0. When it's near 0, it's time to exit.
▶︎Rest
Actually the most emphasized timing. Here, focus on 'Strain'. Strain takes a little time to measure (it displays 0 during that time). After a while, numbers 1-7 are displayed. The initial phase of rest is the most relaxing, so if 1-2 is displayed when the number first appears, it's a sign of relaxation, and if Strain is 1, it's perfect!
You can adjust the perfect match of load and timing for sauna, cold bath, and rest within the bathing area.
Advanced New Functions: 'Timeless' and 'Meditation Sauna Mode'
'Timeless' is a function that hides the 'time' display during sauna mode. It can be changed from the settings screen of the app "Sa no Kuni." Even if you try to focus on your senses, a quick glance at the time can make you feel constrained by it. In Timeless mode, only heart rate and autonomic nervous system status are displayed, allowing you to enjoy sauna in an environment where it's easier to focus on your senses.
'Meditation Sauna Mode' is one of the modes of SAWATCH-3. It is displayed as 'Meisou'. In this mode, nothing is displayed on the screen, and only measurements are taken, similar to sauna mode. This mode is for super advanced users, designed for deeper introspection into one's internal information and complete immersion in sauna.
First, grasp the sensation in normal sauna mode, then solidify it with Timeless, and finally check with Meditation Sauna Mode.
7 Evolved Points That Change Sauna and Daily Life
1. Further evolved notification function in sauna
Notification functions based on heart rate and time (both configurable simultaneously) will be implemented independently for the sauna room, cold bath, and rest. Previously, notifications would vibrate when a set heart rate was exceeded, but with SAWATCH-3, heart rate and time can be individually set for the sauna room, cold bath, and rest. For example, in a regular sauna, set to 130bpm; in a low-temperature sauna where heart rate doesn't rise as much, set to 120bpm or 10 minutes for notification; cold bath for 30 seconds; rest for 5 minutes. These detailed settings fulfill highly requested user demands.
100plus Inc. (Headquarters: Tokyo, Representative Director CEO: Hirotaka Kato) has started sales (reservation acceptance) for "SAWATCH-3," the third generation of its sauna-exclusive wearable device.
While sauna is becoming a well-established health habit, if the burden on the body becomes excessive, the very health benefits can have "adverse effects." It is necessary to understand "how to enter properly" according to one's constitution and physical condition on that day, but relying solely on sensation is difficult.
Therefore, we have developed SAWATCH as a device to safely and deeply enjoy sauna based on objective data.
After the second-generation device (SHOWDOWN-1) significantly updated measurement performance during sauna, SAWATCH-3 redesigned from scratch, further refining durability, stability, and sauna measurement functions. Furthermore, this latest model allows users to reflect on how sauna affects their "daily life" (activity level, stress level, sleep), evolving into a "partner" that maximizes the effects of sauna.
Sauna measurement further evolved! Real-time understanding of autonomic nervous system status!
SAWATCH-3's New Functions: 'Strain' and 'Slope'
'Strain' is a function that displays the real-time status of the autonomic nervous system during sauna, cold bath, and rest. By looking at Strain, users can check if there is an excessive load in the sauna room or cold bath, and if they are relaxing during rest.
'Slope' is a function that displays the heart rate trend in real-time. Before an excessive load occurs, it can be used to understand how much load is being applied and at what intensity, thereby "preventing" excessive load.
Recommended Usage
▶︎Sauna Room
In the first half, check 'Slope' to adjust the heart rate trend. The trend differs for the 1st, 2nd, and 3rd sets, so adjust after entering the sauna room; if the number is high, move to a lower tier, and if low, move to a higher tier. In the second half, switch to 'Strain'. It is displayed in 7 levels, so when Strain reaches 5 or 6, it's about time to leave. If it goes up to 7, it's an excessive state. Adjust the load well with breathing.
▶︎Cold Bath
Focus on 'Slope'. When entering a cold bath, the heart rate significantly drops to negative, then gradually stabilizes, and Slope approaches 0. When it's near 0, it's time to exit.
▶︎Rest
Actually the most emphasized timing. Here, focus on 'Strain'. Strain takes a little time to measure (it displays 0 during that time). After a while, numbers 1-7 are displayed. The initial phase of rest is the most relaxing, so if 1-2 is displayed when the number first appears, it's a sign of relaxation, and if Strain is 1, it's perfect!
You can adjust the perfect match of load and timing for sauna, cold bath, and rest within the bathing area.
Advanced New Functions: 'Timeless' and 'Meditation Sauna Mode'
'Timeless' is a function that hides the 'time' display during sauna mode. It can be changed from the settings screen of the app "Sa no Kuni." Even if you try to focus on your senses, a quick glance at the time can make you feel constrained by it. In Timeless mode, only heart rate and autonomic nervous system status are displayed, allowing you to enjoy sauna in an environment where it's easier to focus on your senses.
'Meditation Sauna Mode' is one of the modes of SAWATCH-3. It is displayed as 'Meisou'. In this mode, nothing is displayed on the screen, and only measurements are taken, similar to sauna mode. This mode is for super advanced users, designed for deeper introspection into one's internal information and complete immersion in sauna.
First, grasp the sensation in normal sauna mode, then solidify it with Timeless, and finally check with Meditation Sauna Mode.
7 Evolved Points That Change Sauna and Daily Life
1. Further evolved notification function in sauna
Notification functions based on heart rate and time (both configurable simultaneously) will be implemented independently for the sauna room, cold bath, and rest. Previously, notifications would vibrate when a set heart rate was exceeded, but with SAWATCH-3, heart rate and time can be individually set for the sauna room, cold bath, and rest. For example, in a regular sauna, set to 130bpm; in a low-temperature sauna where heart rate doesn't rise as much, set to 120bpm or 10 minutes for notification; cold bath for 30 seconds; rest for 5 minutes. These detailed settings fulfill highly requested user demands.